Galvano-cautery instrument



(No Model.)

C. MAGGRBGOR.

GALVANO GAUTBRY INSTRUMENT.

No. 595,573. Patented Deo. 14,1897.

6% Mair/M,

iNVEN'T'R A'TTF NEY WITNEEEEE Y 91@ Cil/m. (ff/606%..

Fig. 2.

UNITED STATES PATENT OFFICE.

CHARLES MAOGREGOR, OF DAYTON,`OHIO.

GALVANO-CAUTERY INSTRUM ENT.

SPECIFICATION forming part of Letters :Patent No. 595,573, dated December 14, 1897.

Application tiled October 16,1897.

T0 @ZZ whom, it may concern:

Beit known that I, CHARLES MACGEEGOR, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Galvano-Cauteries; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures and letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in galvano-cautery instruments and is embraced in the construction of the handle or the nonconducting piece in which the electrodes or conductors are mounted, which enables their free manipulation in the hands of the physician or other person applying the instrument.

The object of the invention is to provide a handle and means therein for securing the inner ends of the disconnected conductor or electrode to the end that the instrument will be more durable and less liable to become inoperative, owing to any liability of the electrode contact-pieces becoming loosened.

In the accompanying drawings, Figure 1 is a view of the upper side of a galvano-cautery instrument constructed in accordance with my invention. Fig. 2 is aside elevation thereof. Fig. 3 is a view of the upper section of the handle, showing the electrodes therein and the contact-blocks. Fig. 4 is a similar view of the lower section of the handle. Fig. 5 is an enlarged cross-section on the line @c Qc,

Figs. 6 and 7 are views showing modified means for preventing the electrodes from turning in their seats.

The handle is preferably constructed of the non-conducting material known as woodfiber, is of rectangular form in cross-section, and consists of two sections 1 and 2, which are securely united by means of screws. The

inner side of section l is provided with longitudinal grooves 3 and 4, in which the electrodes or conductors 5 and 6 fit, the latter conductor being disconnected on the broken side of the circuit. The inner ends of the broken electrode 6 are screwed into blocks 7 and 8 of conducting material, which fit into cavities Serial No. 655,386. (No model.)

or recesses 9 and 10 in said section 1. The shapes of these cavities conform to the shapes of the blocks, so that the said blocks cannot become displaced by any endwise pressure on the attached conductors 6. The said electrodes or conductors 5 and G are preferably square in cross-section in order to avoid any possibility of their turning in their seats in the handle while the instrument is being manipulated. rllhe cauterizing loop or wire 15 is secured to the electrodes by binding-screws 16 in a straight line or on an angle to suit the requirements of the cautery work to be performed. The inner side of section 2 of the handle is provided with longitudinal grooves 11 and 12 and cavities 13 and 14, corresponding in shape to those in the othersection and which are adapted to receive and inclose the upper sides of the electrodes 5 and 6 and the blocks 7 and 8. Inboth sections of the handle the cavities which receive the blocks 7 and S have a wall a, of insulating material, left after their formation, which insulates the blocks from the continuous electrode 5, so that the possibility of induction or shortcircuiting is avoided. When the parts of the handle are united, the contact-blocks are maintained in a fixed position in the handle, and the electrodes being square in cross-section and fitting in corresponding grooves in the handle it will be apparent that any disconnection of the electrodes is impossible.

17 designates a circuit-closer of the ordinary spring type,havin g electrical connection with block 7 and adapted to be pressed into contact with a platinum contact-point 1S in electrical connection with block 8 to complete the circuit for work. The blocks 7 and 8 need not necessarily be of rectangular form in order to prevent their disconnection with the ends of the broken electrode. Blocks of circular form will answer as well. The electrodes may be round in cross-section, and means to prevent their turning in their grooves, such as disks or Hanges 20, fixed thereto and provided with slits cut in the two parts of the handle, may be employed.

Having described my invention, I claim- 1. A galvano-cautery instrument comprising a two-part handle each of said parts provided with longitudinal grooves, and cavities therein, a continuous and a disconnected eleccontact-blocks to which the inner ends of the disconnected electrode is affixed, the said blocks being loosely inclosed in the cavities in said handle, and prevented from becoming detached from the ends of the electrode, as herein shown and described.

In testimony whereof I affix my signature zo in presence of two witnesses.

CHARLES MACGREGOR.

IVitnesses:

A. J. FIORINI, R. J. MCCARTY. 

